Photosynthesis and Plant Storage Quiz P138

What is the main purpose of photosynthesis in plants?

• To make food in their leaves and other green parts

• To absorb water from the soil

• To release oxygen into the air

• To produce flowers

Which of the following is a waste product of respiration in plant cells?

• Carbon dioxide and water

• Glucose and oxygen

• Starch and cellulose

• Protein and fat

Why is glucose stored as starch in plant cells instead of being kept as glucose?

• Because starch is insoluble in water and does not affect water balance

• Because starch is easier to transport

• Because glucose is not needed by plants

• Because starch is used for photosynthesis

What is the main function of cellulose in plants?

• To strengthen cell walls

• To store energy

• To produce flowers

• To absorb sunlight

Which test is used to check for the presence of starch in a leaf?

• Iodine solution test

• Benedict’s test

• Biuret test

• Fehling’s test

Why must leaves be boiled in ethanol before testing for starch?

• To remove the green chlorophyll that would mask color changes

• To kill bacteria on the leaf

• To make the leaf softer

• To increase the amount of starch

What color does iodine solution turn in the presence of starch?

• Blue-black

• Red

• Green

• Yellow

How do plants use some of the glucose produced during photosynthesis?

• They break it down using oxygen to provide energy for the cells

• They store it as protein

• They use it to absorb sunlight

• They convert it into fats

What is the main energy store in plants?

• Starch

• Cellulose

• Protein

• Fat

Why do plants store starch in special storage areas like tubers and bulbs?

• To help them survive through the winter

• To attract pollinators

• To increase photosynthesis

• To produce more flowers